Goldscheider, Calvin, author
Litle Brown, 1971
Buku Teks
Spengler, Joseph J. (Joseph John), 1902-1991, author
Prentice-Hall, 1974
Buku Teks
edited by George Dalton
New York, 1971
Buku Teks
Vallier, Ivan, author
Prentice-Hall, 1970
Buku Teks
Murdock, George Peter, author
Free Press, 1965
Buku Teks